The closed circle of suspects is a common element of detective fiction, and the subgenre that employs it can be referred to as the closed circle mystery. Less precisely, this subgenre – works with the closed circle literary device – is simply known as the "classic", "traditional" or "cozy" detective fiction. After Second World War the closed circle mystery became less common, as other types of crime novels rose to prominence. Nonetheless other writers have continued to use this device till modern days, for example Rex Stout, Lucille Kallen, Cyril Hare, Jonathan Gash, Simon Brett.